隔震加固中竖向荷载作用下钢-砌体组合托梁内力修正系数研究  

Study on internal force modification coefficient of steel-brick masonry composite joist under vertical load in seismic isolation and reinforcement

作　　者：赵誉 舒蓉 赵建昌[3] 党育[4] ZHAO Yu;SHU Rong;ZHAO Jianchang;DANG Yu(Gansu Xinyu Urban Construction Co.,Ltd,Lanzhou 730050,China;Gansu Academy of Building Research(Group)Co.,Ltd,Lanzhou 730070,China;School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730060,China)

机构地区：[1]甘肃新宇城市建设有限公司,兰州730050 [2]甘肃省建筑科学研究院(集团)有限公司,兰州730070 [3]兰州交通大学土木工程学院,兰州730070 [4]兰州理工大学土木工程学院,兰州730060

出　　处：《建筑结构》2023年第21期127-131,共5页Building Structure

摘　　要：针对隔震加固中的钢-砌体组合托梁,结合托梁上墙体有无开洞情况,设计了墙上无开洞和开洞两组试件,对其进行了竖向荷载作用下的受力性能试验。研究了托梁上墙体的破坏特点,给出了破坏形式;对比分析了两种状态下托梁截面应力,给出了两种状态下不同截面的受力状态。采用正交试验和线性回归方法,分析了钢-砌体组合托梁的内力修正系数,给出了墙体不开洞与开洞两种不同情况下支座弯矩、轴力和跨中弯矩的修正系数公式。According to the steel-brick masonry composite joist in seismic isolation and reinforcement,considering whether the wall on the joist has holes or not,two groups of specimens without holes and with holes on the wall were designed,and the mechanical performance tests of them under vertical loads were carried out.The failure characteristics of the wall on the joist was studied,and the failure modes were proposed.The stress of joist section under two states was compared and analyzed,and the stress states of different sections under two conditions were given.By using orthogonal test and linear regression method,the internal force modification coefficient of steel-brick masonry composite joist was analyzed,the modification coefficient formulas of support moment,axial force and midspan moment under two different conditions of wall without opening and opening were given.

关 键 词：钢-砌体组合托梁 隔震加固 竖向荷载 受力性能 内力修正系数 

分 类 号：TU746[建筑科学—建筑技术科学]